A216666 Smallest integer b such that (b+1)^p - b^p is prime for all primes p <= prime(n).
1, 1, 1, 1, 6524, 809652228, 30717523794, 55779743835
Offset: 1
Examples
a(1)=a(2)=a(3)=a(4)=1 since 2^2-1, 2^3-1, 2^5-1 and 2^7-1 are primes.
Crossrefs
Cf. A216668.
Extensions
a(7) from Jean-Louis Charton, Sep 18 2012
a(8) from Jean-Louis Charton, Oct 02 2012
Comments